Why the nymph stage poses a detection problem
A tick’s life has several stages: after hatching, it becomes a six-legged larva, then an eight-legged nymph, and finally an adult. At each stage, it needs a blood meal to continue developing. A nymph can carry the Lyme-causing bacteria after feeding on an infected animal, then pass them to a person during a later bite.
The risk is easy to miss because nymphs are both very small and active when people are outdoors. Their bite may not hurt, and the tick can be concealed in hair or a skin fold. An attached tick may therefore go unnoticed long enough to keep feeding. The danger is not that every tiny tick carries Lyme disease, but that a small infected one can be difficult to find.
What happens during a bite
Lyme bacteria live in the tick’s gut. As the tick feeds, the bacteria can move into its saliva and enter the bite site. Transmission usually takes time rather than happening the instant the tick attaches, so finding and removing a tick promptly lowers the chance of infection. It does not make the risk zero, and a tick’s small size means a careful check matters even when no bite is felt.
After time outdoors, check the whole body, including the scalp, behind the ears, underarms, waist, and behind the knees. If a tick is attached, use fine-tipped tweezers to grasp it close to the skin and pull steadily upward. A quick inspection can turn an unnoticed feeding into a tick removed before it has had as much time to transmit bacteria.
